mainboard/intel: Add skeleton for Apollolake RVP board family

RVP1 board comes with DDR3 SODIMMs and discrete VRs.
RVP2 board uses LPDDR3 and PMIC.

Change-Id: I3e47c157c49ad55ff1ba824672ac2630a64a6037
Signed-off-by: Alexandru Gagniuc <alexandrux.gagniuc@intel.com>
Signed-off-by: Andrey Petrov <andrey.petrov@intel.com>
Reviewed-on: https://review.coreboot.org/13298
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins)

src/mainboard/intel/apollolake_rvp/Kconfig

@@ -0,0 +1,20 @@
+if BOARD_INTEL_APOLLOLAKE_RVP1 || BOARD_INTEL_APOLLOLAKE_RVP2
+
+config BOARD_SPECIFIC_OPTIONS
+	def_bool y
+	select SOC_INTEL_APOLLOLAKE
+	select BOARD_ROMSIZE_KB_8192
+
+config MAINBOARD_DIR
+	string
+	default intel/apollolake_rvp
+
+config MAINBOARD_PART_NUMBER
+	string
+	default "Apollolake RVP"
+
+config MAINBOARD_VENDOR
+	string
+	default "Intel"
+
+endif

src/mainboard/intel/apollolake_rvp/Kconfig.name

@@ -0,0 +1,5 @@
+config BOARD_INTEL_APOLLOLAKE_RVP1
+	bool "Apollolake DDR3 RVP1"
+
+config BOARD_INTEL_APOLLOLAKE_RVP2
+	bool "Apollolake LPDDR3 RVP2"

src/mainboard/intel/apollolake_rvp/Makefile.inc

@@ -0,0 +1 @@
+# Nothing yet here

src/mainboard/intel/apollolake_rvp/devicetree.cb

@@ -0,0 +1,9 @@
+chip soc/intel/apollolake
+
+	device cpu_cluster 0 on
+		device lapic 0 on end
+	end
+
+	device domain 0 on
+	end
+end

src/mainboard/intel/apollolake_rvp/romstage.c

@@ -0,0 +1 @@
+/* Nothing here yet, but this file is needed by the build system */